Straw rotating device and spray gun thereof

Abstract

The utility model relates to a spray gun, in particular to a suction tube rotating device and a spray gun thereof. A suction pipe rotating device comprises a rotating knob, a rotating shaft, a rotating shaft and a rotating shaft, one end of the rotary connecting part is arranged on the rotary knob and is movably inserted into the material suction hole of the spray gun; the angle suction pipe comprises a straight pipe and an inclined pipe which are connected with each other, the straight pipe is rotationally arranged in the material suction hole and is connected with the other end of the rotary connecting part, the inclined pipe is obliquely arranged, and the end part of the inclined pipe is close to the joint of the side wall and the bottom of the material barrel of the spray gun. According to the straw rotating device, the angle of the straw can be conveniently adjusted, the straw is always located at the edge of the material barrel, the straw is always inserted into raw materials, the materials can be sucked to the maximum extent, residues of the raw materials are reduced, the utilization rate of the raw materials and the reliability and stability of material suction are improved, the straw rotating device is not affected by the viscosity of the raw materials, and the straw rotating device can freely rotate.

Description

Technical Field

[0001] The utility model relates to a spray gun, in particular to a straw rotating device and a spray gun thereof. Background Art

[0002] During the actual operation of the spray gun, there will be upward and downward spraying angles, that is, the material bucket will be in an inclined state. At this time, the liquid raw material in the material bucket will gather at the lowest point of the material bucket due to the change of the spray gun angle. Generally, the straw in the existing spray gun is a straight pipe. The problem is that when there is little raw material left in the material bucket, the remaining raw material is concentrated in the corner on the inclined side, resulting in a large amount of raw material that cannot be normally sucked. To solve this problem, a soft straw has emerged. For example, a spray gun with a straw that can swing freely disclosed in CN209317956U uses a soft straw and connects a gravity ball at the bottom of the soft straw. When the spray gun works in an inclined state, the raw material in the material bucket will gather at the lowest point of the material bucket under the action of gravity, and the gravity ball will also move to the lowest point of the material bucket under the action of gravity, thereby driving the soft straw to bend, so that the feeding end of the soft straw can always be located at the lowest point of the material bucket and the raw material cannot be sucked due to the inclination of the material bucket. However, the disadvantages of this spray gun are as follows:

[0003] 1. The soft body gravity swing is affected by the viscosity of the raw material. When the viscosity of the raw material is high, the swing is not free and it is impossible to quickly and effectively contact the liquid feeding;

[0004] 2. When the length of the soft straw is long, the feeding end will tilt upward, and there will be a certain amount of raw material that cannot be sucked when the material bucket is in a horizontal state. When the length of the soft straw is short, the soft straw swings to the edge of the material bucket under the action of the gravity ball, but it cannot fall to the lowest point and cannot completely suck the material, and there is a lot of raw material residue. As Figure 14 shown;

[0005] 3. It is difficult to control the softness and hardness of the soft straw. If it is too soft, it will be squeezed by the pressure in the material bucket and the feeding will be blocked. If it is too hard, the swing is not free. Content of the Utility Model

[0006] To solve the problems that the above-mentioned soft straw cannot swing freely due to the influence of the raw material viscosity, there is a lot of raw material residue, and it is difficult to control the softness and hardness, the utility model provides a straw rotating device. The specific technical solution is as follows:

[0007] A straw rotating device includes: a rotary knob rotatably arranged on the top of the gun body of the spray gun; a rotating connection part, one end of which is arranged on the rotary knob and is movably inserted into the material suction hole of the spray gun; and an angled straw, including a straight pipe and an inclined pipe connected to each other. The straight pipe is rotatably arranged in the material suction hole and is connected to the other end of the rotating connection part. The inclined pipe is inclined, and the end of the inclined pipe is close to the connection part of the side wall and the bottom of the material bucket of the spray gun.

[0008] Preferably, the rotating connection part includes: a connection support seat rotatably arranged in the material suction hole; and a connecting rod, one end of which is arranged on the connection support seat and the other end of which is connected to the straight pipe.

[0009] Preferably, it further includes: a positioning sleeve arranged at the top of the gun body and rotatably located between the rotary knob and the rotating connection part for restricting the axial position of the rotating connection part.

[0010] Preferably, it further includes: a suction pipe fitting sleeve arranged in the material suction hole of the spray gun. A positioning ring and a plurality of connecting ribs respectively connected to the positioning ring and the suction pipe fitting sleeve are arranged inside the suction pipe fitting sleeve, and the rotating connection part is rotatably inserted into the positioning ring.

[0011] Preferably, it further includes: a rotary connection seat arranged at the bottom of the rotating connection part. A plurality of driving plates are arranged on the rotary connection seat, and the driving plates are movably inserted into the driving grooves at the top of the straight pipe.

[0012] Furthermore, a plurality of connecting external teeth are annularly arranged on the rotating connection part, a connecting hole is arranged on the rotary connection seat, a plurality of connecting internal teeth are annularly arranged on the connecting hole, the rotating connection part is inserted into the connecting hole, and the connecting external teeth are engaged with the connecting internal teeth.

[0013] Preferably, a material suction inclined surface for reducing the gap between the end of the inclined pipe and the material bucket is arranged at the feeding end of the inclined pipe.

[0014] Preferably, a plurality of first sealing rings are arranged between the rotating connection part and the material suction hole; a plurality of second sealing rings are arranged between the straight pipe and the suction pipe fitting sleeve.

[0015] A spray gun includes: the above-mentioned suction pipe rotating device; and a sealing device arranged between the gun body and the material bucket.

[0016] Preferably, the sealing device includes: a sealing ring arranged on the gun body and located at the top of the material bucket; a sealing disc arranged on the sealing ring and provided with a fourth sealing groove, a second ventilation hole arranged at the bottom of the fourth sealing groove and a plurality of ventilation columns; and a sealing gasket hermetically arranged on the fourth sealing groove and provided with a plurality of ventilation slits located between adjacent ventilation columns.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] The straw rotation device provided by the present utility model can not only conveniently adjust the angle of the straw, but also always be at the edge of the material bucket, so that the straw is always inserted into the raw material, enabling the maximum amount of material suction, reducing the residue of the raw material, improving the utilization rate of the raw material as well as the reliability and stability of material suction, and being able to rotate freely without being affected by the viscosity of the raw material. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the straw rotation device;

[0020] Figure 2 is a cross-sectional view of the straw rotation device;

[0021] Figure 3 is an assembly drawing of the rotary knob and the rotating connection part;

[0022] Figure 4 is a schematic structural diagram of the connecting support;

[0023] Figure 5 is a front view of the straw fitting sleeve;

[0024] Figure 6 is a front view of the rotary connection seat;

[0025] Figure 7 is an assembly drawing of the rotary connection seat and the angled straw;

[0026] Figure 8 is a schematic structural diagram of the spray gun;

[0027] Figure 9 is a cross-sectional view of the spray gun;

[0028] Figure 10 is an exploded view of the spray gun;

[0029] Figure 11 is a schematic diagram of the spray gun in an inclined state;

[0030] Figure 12 is a schematic structural diagram of the sealing disc;

[0031] Figure 13 is a schematic structural diagram of the sealing gasket;

[0032] Figure 14 is a schematic diagram showing that the flexible straw in the prior art cannot reach the lowest point of the material bucket. Detailed Embodiments

[0033] The present utility model will be further described below in conjunction with the accompanying drawings.

[0034] Embodiment 1

[0035] As Figures 1 to 11As shown in the figure, a straw rotating device includes a rotary knob 1, a rotating connection part 3, and an angled straw 6. The rotary knob 1 is rotatably installed at the top of the gun body 80 of the spray gun and is connected to one end of the rotating connection part 3. The rotating connection part 3 is movably inserted into the material suction hole 81 of the spray gun. The angled straw 6 includes a straight pipe 61 and an inclined pipe 62 that are connected to each other. The straight pipe 61 is rotatably installed in the material suction hole 81, and the top of the straight pipe 61 is connected to the other end of the rotating connection part 3. The inclined pipe 62 is inclined, and the end of the inclined pipe 62 is close to the connection between the side wall and the bottom of the material bucket 91 of the spray gun. The included angle between the straight pipe 61 and the inclined pipe 62 is an obtuse angle. The straight pipe 61 is coaxially arranged with the material suction hole 81 and is in a vertical state. The inclined pipe 62 is in an inclined state and is inclined towards the connection between the side wall and the bottom of the material bucket 91, so that the end of the inclined pipe 62 is close to the connection between the side wall and the bottom of the material bucket 91, and it can rotate into the interior of the raw material for suction when the material bucket 91 is tilted, reducing the residue of the raw material.

[0036] The rotating connection part 3 passes through the gun body 80 and is connected to the angled straw 6, thereby facilitating the rotation of the angled straw 6 through the rotary knob 1. The rotary knob 1 drives the angled straw 6 to rotate at any angle in the material bucket 91 through the rotating connection part 3. The position of the feeding end of the angled straw 6 can be flexibly adjusted according to the tilted state of the material bucket 91 during work, so that the feeding end of the angled straw 6 can always be inside the liquid raw material, thereby ensuring that the raw material can be fully sucked, reducing the residue of the raw material, and improving the utilization rate of the raw material.

[0037] As Figure 2 and Figure 9 shown in the figure, in order to suck the raw material to the maximum extent and reduce the residue of the raw material, a suction inclined surface 63 is provided at the feeding end of the inclined pipe 62. The suction inclined surface 63 is used to reduce the gap between the end of the inclined pipe 62 and the material bucket 91, so that the feeding end can be close to the bottom of the material bucket 91 and suck the maximum amount of raw material.

[0038] As Figure 5 and Figure 9 shown in the figure, in order to facilitate the radial positioning of the rotating connection part 3, a straw fitting sleeve (4) is further included. The straw fitting sleeve (4) is installed at the bottom of the material suction hole (81) of the spray gun and is movably inserted into the other end of the rotating connection part (3). The straw fitting sleeve 4 can be connected to the material suction hole 81 by threads or can be fixedly connected by glue. The straw fitting sleeve 4 is in a sealed connection with the material suction hole 81. As Figure 5As shown, a positioning ring 41 and connecting ribs 42 are provided inside the straw fitting sleeve 4. The positioning ring 41 is coaxially arranged with the straw fitting sleeve 4 and is connected to the straw fitting sleeve 4 through the connecting ribs 42. There are three connecting ribs 42 arranged in an annular array, and a material passing groove 43 is formed between adjacent connecting ribs 42. The material passing groove 43 is used to communicate the material suction hole 81 with the straight pipe 61. The straw fitting sleeve 4, the positioning ring 41 and the connecting ribs 42 are an integral structure. The connecting rod 32 is movably inserted into the positioning ring 41. The diameter of the positioning ring 41 is slightly larger than that of the connecting rod 32, which can realize the radial positioning of the bottom of the connecting rod 32. The connecting support 31 and the positioning ring 41 realize the radial positioning of the upper and lower ends of the connecting rod 32, thereby improving the stability of the connecting rod 32.

[0039] As Figure 2 shown, two annular second sealing grooves are provided at the top of the straight pipe 61. A second sealing ring 902 is installed in the second sealing groove. The second sealing ring 902 is movably inserted into the inside of the straw fitting sleeve 4 to realize the sealing between the straw fitting sleeve 4 and the straight pipe 61.

[0040] As Figure 2 and Figure 3 shown, the rotating connection part 3 includes a connecting support 31 and a connecting rod 32. The top of the connecting support 31 is fixedly connected to the rotary knob 1 by screws. The bottom of the connecting support 31 is fixedly connected to the top of the connecting rod 32. The connecting rod 32 is movably inserted into the material suction hole 81. The diameter of the connecting rod 32 is smaller than that of the material suction hole 81, which does not affect the suction of the material suction hole 81. The bottom of the connecting rod 32 is connected to the top of the straight pipe 61. The connecting support 31 is provided with two annular first sealing grooves. A first sealing ring 901 is installed in the first sealing groove. The first sealing ring 901 is movably inserted into the material suction hole 81 to realize the sealing between the connecting support 31 and the material suction hole 81, that is, to realize the sealing of the top of the material suction hole 81. The connecting support 31 facilitates the realization of sealing and at the same time facilitates the connection between the rotary knob 1 and the connecting rod 32, solves the problem that the connecting rod 32 with a small diameter cannot realize sealing, improves the strength at the same time, can bear a large radial force, improves the reliability and stability of rotation, and can realize the radial positioning of the top of the connecting rod 32.

[0041] As Figures 2 to 4As shown in the figure, in order to achieve the axial positioning of the rotating connection part 3 and prevent the rotating connection part 3 from moving up and down along the axis, a positioning sleeve 2 is further included. One end of the positioning sleeve 2 is installed at the top of the gun body 80 by means of a thread, and the other end is provided with a rotating hole 21. The top of the connecting support 31 is provided with a rotating column 311. The rotating column 311 is movably inserted into the rotating hole 21, and the diameter of the rotating column 311 is smaller than the diameter of the connecting support 31, so a shoulder 312 is formed. The shoulder 312 is movably abutted against the inside of the positioning sleeve 2. The rotating column 311 is connected to the rotary knob 1, and the rotary knob 1 is movably abutted against the top of the positioning sleeve 2. The positioning sleeve 2 is movably clamped between the rotary knob 1 and the connecting support 31, thereby realizing the axial limit of the rotating connection part 3, so that the rotary knob 1 and the rotating connection part 3 can only rotate and cannot move up and down along the axis.

[0042] As Figure 6 and Figure 7 shown, for the convenience of assembly and production, the connecting rod 32 is connected to the angle suction pipe 6 through the rotary connection seat 5. The outer circumferential surface of the rotary connection seat 5 is annularly and arrayedly provided with three driving plates 51. The center of the rotary connection seat 5 is provided with a connection hole 52. The connecting rod 32 is inserted into the connection hole 52 to realize the connection between the rotary connection seat 5 and the connecting rod 32. The top of the straight pipe 61 is annularly and arrayedly provided with three driving grooves 66. The driving grooves 66 correspond to the driving plates 51 one by one. The driving plates 51 are movably inserted into the driving grooves 66. The driving plates 51 drive the angle suction pipe 6 to rotate through the driving grooves 66. The inner circumferential surface of the connection hole 52 is annularly and arrayedly provided with a plurality of connecting internal teeth 53. The outer circumferential surface of the bottom of the connecting rod 32 is annularly and arrayedly provided with a plurality of connecting external teeth 321. The connecting external teeth 321 are inserted into the connecting internal teeth 53 and mesh with each other, which can not only ensure the reliable connection between the connecting rod 32 and the rotary connection seat 5, but also prevent relative rotation between the connecting rod 32 and the rotary connection seat 5, so that the rotary connection seat 5 can rotate synchronously with the connecting rod 32.

[0043] A support ring 64 is further provided on the straight pipe 61. The support ring 64 is movably located below the sealing device of the spray gun. The support ring 64 is used to support the sealing device to realize the positioning of the sealing device.

[0044] Embodiment 2

[0045] As Figures 8 to 13As shown in the figure, a spray gun includes a straw rotation device. The spray gun further includes a material bucket 91, a gun body 80, a sealing device, a valve needle 83, a nozzle 86, an atomizing air cap 87, a compression nut 88, a spring 84, a wrench 89 and a connecting pin 85. The gun body 80 is installed at the top of the material bucket 91 by threads. A sealing device is installed between the material bucket 91 and the gun body 80. The angled straw 6 is movably inserted on the sealing device. Inside the gun body 80, there are a valve hole 82 and a material suction hole 81 that are interconnected. The material suction hole 81 is vertically arranged along the axis, and the valve hole 82 is horizontally arranged. The material suction hole 81 and the valve hole 82 form a cross-shaped channel. The valve needle 83 is movably inserted into the valve hole 82. At one end of the gun body 80, a nozzle 86, an atomizing air cap 87 and a compression nut 88 are successively installed. The nozzle 86 communicates with the valve hole 82. The compression nut 88 fixes the atomizing air cap 87 and the nozzle 86 on the gun body 80 and presses against the end of the valve hole 82. The valve needle 83 is movably inserted into the valve hole 82, and two third sealing rings 903 are installed on the valve needle 83 to achieve the seal between the valve needle 83 and the valve hole 82, and the third sealing ring 903 is also located on one side of the material suction hole 81. The spring 84 is located at the end of the valve hole 82 away from the nozzle 86. The two ends of the spring 84 respectively abut against the bottom of the valve hole 82 and the end of the valve needle 83, and are used to press the valve needle 83 against the nozzle 86. The top of the wrench 89 is rotatably installed on the rotating pin 801 at the top of the gun body 80. The wrench 89 is rotatably connected to the valve needle 83 through the connecting pin 85. The connecting pin 85 is located between the third sealing ring 903 and the spring 84. By operating the wrench 89, the movement of the valve needle 83 can be controlled, and thus the opening degree between the valve needle 83 and the nozzle 86 can be controlled to adjust the spray volume. Inside the gun body 80, there is also a first ventilation hole 801 that communicates with the material bucket 91. The first ventilation hole 801 is used to introduce high-pressure gas. The sealing device includes a sealing ring 92, a sealing disc 93 and a sealing gasket 94. The outer diameter of the sealing ring 92 is the same as the top of the material bucket 91 and is used for sealing between the gun body 80 and the material bucket 91 and is clamped on the gun body 80. The outer circular surface of the sealing disc 93 is provided with a fifth sealing groove 934. The fifth sealing groove 934 is inserted on the sealing ring 92. The top of the sealing disc 93 is provided with a fourth sealing groove 931 and ventilation columns 932. There are four ventilation columns 932, and the ventilation columns 932 are arranged in a circular array at the bottom of the fourth sealing groove 931. A second ventilation hole 933 is also provided at the bottom of the fourth sealing groove 931. The sealing gasket 94 is sealingly installed in the fourth sealing groove 931 and abuts against the ventilation columns 932. The sealing gasket 94 is annular, and four ventilation slits 941 are arranged in a circular array on the sealing gasket 94. The ventilation slits 941 are located between adjacent ventilation columns 932, that is, the ventilation slits 941 and the ventilation columns 932 are staggered. The ventilation slits 941 are used to form one-way ventilation, so that high-pressure gas can enter the fourth sealing groove 931 through the ventilation slits 941 on the sealing gasket 94 and then enter the material bucket 91 through the second ventilation hole 933.The ventilation slit 941 can only ventilate, and the ventilation slit 941 can prevent the liquid raw material from entering the top of the sealing gasket 94, and limit the raw material in the barrel 91. The sealing gasket 94 is made of elastic material, and the ventilation column 932 is used to form a ventilation cavity between the sealing gasket 94 and the fourth sealing groove 931, so as to facilitate the downward deformation of the ventilation slit 941 of the sealing gasket 94, so as to realize the opening of the ventilation slit 941, and the ventilation column 932 is used to support the sealing gasket 94. The ventilation slit 941 is in the shape of a long strip or a cross. When the high-pressure gas enters the top of the sealing gasket 94 through the first vent hole 801, the high-pressure gas pushes the ventilation slit 941 to deform toward the ventilation cavity, that is, the ventilation slit 941 deforms toward the fourth sealing groove 931, so as to realize the opening of the ventilation slit 941, and the high-pressure gas enters the ventilation cavity, and enters the inside of the barrel 91 through the second vent hole 933, and then presses the raw material inside the barrel 91 toward the nozzle 86.

[0046] The straight tube 61 is rotatably inserted on the sealing gasket 94 and the sealing disk 93. Since the sealing gasket 94 is made of elastic material, such as rubber, a seal is formed between the sealing gasket 94 and the straight tube 61. The support ring 64 is movably pressed against the sealing disk 93 to support the sealing disk 93 and prevent the sealing disk 93 and the sealing gasket 94 from moving axially.

[0047] A waist-shaped first through hole 831 is provided on the valve needle 83. The first through hole 831 is movably inserted into the connecting rod 32 so that the connecting rod 32 and the valve needle 83 do not interfere with each other and work independently.

[0048] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A straw rotating device, characterized in that, Comprising: A rotary knob (1), rotatably disposed at the top of the gun body (80) of the spray gun; A rotary connecting portion (3), one end thereof is disposed on the rotary knob (1) and is movably inserted into the material suction hole (81) of the spray gun; and An angled suction pipe (6), comprising a straight pipe (61) and an inclined pipe (62) connected to each other, the straight pipe (61) is rotatably disposed in the material suction hole (81) and is connected to the other end of the rotary connecting portion (3), the inclined pipe (62) is inclined, and the end of the inclined pipe (62) is close to the connection between the side wall and the bottom of the material bucket (91) of the spray gun.

2. The straw rotating device according to claim 1, characterized in that, The rotary connecting portion (3) comprises: A connecting support (31), rotatably disposed in the material suction hole (81); and A connecting rod (32), one end thereof is disposed on the connecting support (31) and the other end is connected to the straight pipe (61).

3. The straw rotation device according to claim 1, characterized in that, Further comprising: A positioning sleeve (2), disposed at the top of the gun body (80) and rotatably located between the rotary knob (1) and the rotary connecting portion (3) for restricting the axial position of the rotary connecting portion (3).

4. A straw rotating device according to claim 1, characterized in that, Further comprising: A suction pipe fitting sleeve (4), disposed in the material suction hole (81) of the spray gun, a positioning ring (41) and a plurality of connecting ribs (42) respectively connected to the positioning ring (41) and the suction pipe fitting sleeve (4) are provided inside the suction pipe fitting sleeve (4), and the rotary connecting portion (3) is rotatably inserted into the positioning ring (41).

5. A straw rotating device according to claim 1, characterized in that, Further comprising: A rotary connecting seat (5), disposed at the bottom of the rotary connecting portion (3), a plurality of driving plates (51) are provided on the rotary connecting seat (5), and the driving plates (51) are movably inserted into the driving grooves (66) at the top of the straight pipe (61).

6. The straw rotating device according to claim 5, characterized in that, A plurality of connecting external teeth (321) are annularly arrayed on the rotary connecting portion (3), a connecting hole (52) is provided on the rotary connecting seat (5), a plurality of connecting internal teeth (53) are annularly arrayed on the connecting hole (52), the rotary connecting portion (3) is inserted into the connecting hole (52), and the connecting external teeth (321) are engaged with the connecting internal teeth (53).

7. A straw rotating device according to claim 1, characterized in that, A suction material inclined surface (63) for reducing the gap between the end of the inclined pipe (62) and the material bucket (91) is provided at the feeding end of the inclined pipe (62).

8. A straw rotating device according to claim 1, characterized in that, A plurality of first sealing rings (901) are provided between the rotary connecting portion (3) and the material suction hole (81).

9. A spray gun, characterized in that, Comprising: A suction pipe rotating device according to any one of claims 1 to 8; And A sealing device, the sealing device is disposed between the gun body (80) and the material bucket (91).

10. A spray gun according to claim 9, characterized in that, The sealing device comprises: A sealing ring (92), disposed on the gun body (80) and located at the top of the material bucket (91); A sealing disc (93), disposed on the sealing ring (92) and provided with a fourth sealing groove (931), a second ventilation hole (933) provided at the bottom of the fourth sealing groove (931) and a plurality of ventilation columns (932); and The gasket (94) is hermetically arranged on the fourth sealing groove (931) and is provided with a plurality of ventilation slits (941), and the ventilation slits (941) are located between adjacent ventilation columns (932).

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